I have a question about my dog ?

Ok for a few days I have been getting bumps on my arms. And I got medicine for it and my doctor said it is an allergic reaction so It could or couldn't be my dogs fault. So my gma put him out the house he is fully vacinated has flea mite and tick preventatives so I really want to bring him back in but my grama is always saying he likes it outside but it gets to be 108* where I'm at so I'm like WTF so in da morn should I just give him a bath give him some more preventatives and bring him in or what please I need advice becaouse I love him dearly ??????????